Window netting with rolling up device



Oct. 24, 1933. E. SYLVESTER WINDOW NETTING WITH ROLLING UP DEVICE Filed June 6. 1932 5 Sheets-Sheet 1 vOct. 24, 1933. E. SYLVESTER WINDOW NETTING WITH ROLLING UP DEVICE Filed June 6. 1932 3 Sheets-Sheet 2 5 fag Oct. 24, 1933. E. SYLVESTER 1,931,805

WINDOW NETTING WITH ROLLING UP DEVICE Filed June 6. 1932 3 Sheets-Sheet 3 Patented Oct. '24, 1933 P TEN oFFIce wlNnow NETTING WITH ROLLING. UP

DEVICE Ewald Sylvester, Granschutz, Germany Application June 6, 1932, Serial No. 615,674, and

; in Germany October 31, 1931 6 Claims. (01. 156-39) This invention relates to a window nettin with rolling up device, especially for casement windows and for protecting against insects. The extremely limitedspace available in'the frames and particularly on' the upper abutment arm or transomof casement windows and also the shape of. the frame and-the range of movement of the casement window itself rendered it hitherfree movement of the window sashes is-not impeded bythe device. These difficulties-are overcome according to the invention inthat the bearings of the device to be fitted on the transom;

between theupper and lower windows are constructed as retort-shaped supports of the casing containing the winding 'up device for the netting and a pressing on roller for the netting is connected to these supports shiftable relative. to the transom. Further, according to the invention a special netting is employed which can be rolled up to form a roll of very small diameter so that the dimensions of the device ingly reduced.

Several embodiments of the invention are illustrated by way of example in the accompanying drawings in which: A J

Fig. 1 shows a form of construction in cross section on line I-I of Fig. 2.

Fig.2, is a longitudinal section on line II-II of Fig. 1. 1

Figs. 3 and 4 each show a modifiedform of construction in cross section.

Fig. 5 is an elevation of a casement. window showing the device in use.

The device consists of a two-part retortshaped support serving as bearing, the lower portion of which support is rigidly mounted on the horizontal cross bar or transom 1 between the neighboring bars 2 and 3 of the top light frame or window sash. Two such; supports are employed. The upper part of the support carries a casing 4 for the winding device for the netting 5. This casing is of the smallest possible diameter I and consequently a special. netting must be employed whichcan be rolled to form a roll of very small diameter. The support is so constructed that the casing 4 of the winding device is brought into such a position that, when not in use, it does not impede the opening of can be correspondon-roller 6 which presses the netting againstthe transom 1 and thus against the lateral-bars of thewindow frame or of the closed window sash.

A retort-shaped support'has been found suitable formeeting these conditions.

In the form of construction illustrated in Figs.

1 and 2 the support consists of a foot 7 as base and of a retort-shaped element 8. as upper part in which the tubular-casing 4 is inserted. The

foot parts of the supports are fixed by screws at suitable distances apart on the transom 1 of I the window. The two support elements 8 are mounted one on each end .of the casing 4, which is so wide that the netting. 5., which it accommo dates, covers the entire window aperture of a sash and bears laterally against the middle bar of the closed window sash on the one hand and against the window frame in the recess of the open window sash on the other hand. The foot 7 and the upperv part 8 of eachsupport are superposed and have an inclined .joint. The

upper part has on its bearing face an angular projecting nose9, and the foot part has a corre-.. sponding notch .10. The two parts are inter connected by'this nose and notch and require no further connection. In the upper part 8 of each support a shaft 11 of the rolling device is rig-idly mounted. A roller 12 is rotatably mounted on the shaft .11, and the netting 5 is fixed at one end on this roller, whereas its free end projects through a slot 13 in the casing 4. A spring 14 of suitable shape isfitted between the rigid shaft 11 and the rotatable roller 12 so that it is wound during. the unrolling or unwinding of the netting. The free end of the netting is stiffened-by a bar 15 which, when the netting is in use, is hooked on to the lower window frame bar and carries a handle for pulling down the netting. shiftably mounted. This rack carries on its inner end directed, towards the transom of the window a hinged arm 17, sothat this arm can only be oscillated in upward direction. The arm carries on its free end the pressing .on roller 6 which, when the netting is not in use, must be situated at a certain distance from the window frame to enable the netting to be pulled down with'a minimum of friction. vWhen this has been effected however the roller 6 must press the netting tightly against the transom l so that it bears tightly againstthe window frame. The movement of the pressure roller towardsan-d away from the transom is effected automatically during the pulling down or winding of the netting.

A planet wheel 18, 19 is mounted on the end Inthe-support part 8 a rack 16 is of -the netting roller and a toothed wheel 20 is keyed on the shaft 11 in the support element 8, a loose toothed wheel 21 being mounted on the hub of the toothed wheel 20. When the roller 12 is rotated, the toothed wheel 18 runs on the fixed wheel 20, whereas the toothed wheel 19 connected to the toothed wheel 18 rotates the loose toothed wheel 21. This latter meshes with a toothed wheel 23 mounted on the upper support part 8. On the axle of the toothed wheel 23 a toothed wheel 24 is mounted and meshes with the rack'l6. The ratio of transmission from the roller 12 to the rack 16 is so small that the rack is only shifted a few centimetres during the complete unwinding of the netting but sufiiciently far for the pressing on roller'fi to press the netting against the transom 1. The window frame bar 3 is not in the way, as this window sash is first opened. 7

The pulled down netting is then hooked or clamped on to the lower -window frame bar by means of the bar 15 on the end of the netting.

Small 'oscillatable clamping levers may be arranged countersunk in the closed window sash arm and in the window frame to press the Iongitudinal middle portion of the netting against the window frame. I

In order to bring the netting into inoperative position, the end bar 15 is freed from the window frame arm and the netting allowed to rise slowly. The spring in the roller winds the netting. On the end bar of the netting a catch eye 25 is arranged which engages under the pressure roller 6 during the winding of the netting and'limits the winding of same. This bar 15 and also the end of the netting would impede the closing of the window sash 3. For this reason the supporting arms 1'? of the pressure roller are oscillatable in upward direction. They are swung upwards by the catch eye 25 so that the netting bar 15 is brought out of the range of movement of the window sash. By disengaging the upper part 8 from the notch 10 of thebearing foot '7 the winding device can be entirely removed.

The necessary small diameter of the winding device is obtained by a special netting. This consists of a fabric of hemp or the like which is evidently more pliable than a wire fabric. In order to attain the necessary strength, the fabric netting is coated with a cellulose ester or a similar caoutchouc-like substance. Thus, the fabric netting is rendered stiff and wire-like without however appreciably losing its pliability as fabric.

Such a fabric netting can be wound to a diameter of 1 cm.

In the form of construction illustrated in Fig. 3 the upper part 8' of the support is articulated on the base 7 by means of a double-jointed link 26. The upper part 8 embraces the casing 4 of the winding device with the exception of a slot 13 and carries on its end a rigid arm 27 on the free end of which the pressing on roller 6 is mounted. When it is desired to use the device, the window sash 3 is first opened, whereupon the netting is pulled down and fixed. The winding device is then lifted by a handle 28 and pushed against the window. It then assumes a position in which the pressing on roller 6 bears tightly against the transom 1. When the device is no longer required and it is desired to close the win-.

dow, the winding device is oscillated away from the window, the netting released and its end clamped by means of an arm 29 arranged on the bar 15 in a clamp 30 arranged on the arm 27 of the upper part 8'. The pressure roller 6 and the end of the netting are then out of the range of movement of the window sash 3 so that the sash can be closed. Either or both of the hinge pins at the ends of the link 26 can be made removable so that the upper part 8' of the bearing can be detached together with the winding device.

In the form of .construction illustrated in Fig. 4 the upper part 8" is connected to the base 7" by means of a sleeve 31. The inner end of the upper part 8" has an extension 32 which fills the inner diameter of the sleeve and a nose 33 which extends through a slot 34 in the sleeve. The upper part 8" has farther outwards an extension 35 which likewise fills the inner diameter of the sleeve, whereas the portion between the two extensions 32 and 35 is thinner than the inner diameter of .the sleeve. Consequently, the upper part 8 can be shifted within the sleeve as far as the slot 34 will allow and is guided by the two extensions 32 and 35. The slot 34 allows the upper part to be shifted outwardly until the extension 35 lies outside the sleeve. Thus, the upper part can assume an inclined position in downward direction in the'sleeve and its outer extension 35 rests on the edge of the sleeve. The sleeve is arranged upwardly inclined on the base 7". The upper part 8" is otherwise constructed similarly'to the modification shown'in Fig. 3. It embraces the casing 4 of the winding'device and carries on its end an arm 36 with the'pressure roller 6. The free end of the netting-is hooked by means of an eye 38 into a hook 37 on the arm 36 so that it cannot hang within the'range of movement of the window sash. When it is desired to use the device, the netting is pulled down 110 and fixed by means of the bar 15, whereupon the winding device is lifted by its handle 39 and pushed into the sleeve. The pressure roller is thus pressed tightly on to the transom l. The entire winding device can be removed from the 5 base 7 by unscrewing a screw 40. The pin 33 may also be screwed into or otherwise removably mounted on the upper part 8" so that the upper part 8- can be detached from the base 7" together with the winding device.

1. In a window netting two bearings, a tubular casing carried by said bearings, a winding device for the netting accommodated in said casing, said bearings being each of retort-shape with a nar- 5 row foot portion and an upwardly inclined upper portion embracing said casing and detachably mounted on the foot portion, and means for guiding the netting between said casing and the foot portions of said bearings. 13C

2. In a window netting two bearings, a tubular casing carried by said bearings, a winding device for the netting accommodated insaid casing, each bearing having a narrow foot portion and an upwardly inclined upper portion 'hingedly connected to and oscillatable relative to the foot portion and embracing said casing, and means for guiding the netting between said casing andthe foot portions of the bearings.

3. In a window netting two bearings, a tubular casing carried by said bearings, a winding device for the netting accommodated in said casing, each of said bearings having a narrow foot portion and an upwardly inclined upper portion embracing said casing and shiftable in the foot portion into an outer and inner position relative to the foot portion, and means for'guiding the netting between said casing and the foot portions of said bearings.

4. In a window netting two bearings, a. tubular 150 casingearriedbysaidbearingnawindingdevice for the netting accommodated in said casing, each of said bearings a narrow foot portion and an upwardly inclined upper portion embracing said casing, a guide roller betwe n said bearings adapted to guide the netting. ftwo racks one in each of said bearings supporting said guide roller, and means for shifting said racks relative to the foot portions 0! said bearings during the winding-and unwinding oi the nettingby said winding device.

5. In a window netting two bearings, a tubular casing carried by said bearings. a winding device for the netting accommodated in said casing, each bearing having a narrow ioot portion and an upwardly inclined upper portion embracing said casing, a guide roller for the netting, an arm ontheupperportionoteechoisaidbearingsdirected towards the foot portions of said bearings carrying said guide roller and shiitable with the upper portions 01 said bearings.

6. In a window netting two bearings, a tubular casing carried by said bearings, a winding device for the netting accommodated in said casing, each bearing having a narrow foot portion and an upwardly inclined upper portion embracing said casing, a guide roller for the netting, an arm on the upper portion of each of said bearings-directed towards the foot portions of said bearings carrying said guide roller and shiitable with the upper portions and toward the foot portions of said bearings.

EWAID SYLVES'I'ER. 

